P2472
Exhaust Gas Temperature Sensor Circuit Intermittent/Erratic Bank 1 Sensor 4
Exhaust gas temperature (diesel emissions)
Generic OBD-II
Medium
What it means
P2472 sets when the bank 1, sensor 4 exhaust-gas-temperature (EGT) signal cuts out or jumps around instead of reading steadily. The computer uses exhaust heat to protect the catalyst and diesel particulate filter and to time regeneration. "Intermittent/erratic" almost always points to a loose connector or chafed wiring rather than an engine fault.
Medium
Can I keep driving? Usually driveable, but have it checked — an intermittent exhaust-temperature signal can interrupt DPF regeneration and occasionally trigger reduced power.
Common symptoms
What you'll notice
- Check-engine light that may come and go
- Occasional reduced power or limp mode
- DPF regeneration may be interrupted mid-cycle
- Often no steady driving symptom
Common causes
Most likely first
- Intermittent connection at the bank 1, sensor 4 EGT sensor connectorLikely
- Chafed or loose wiring that flexes with heat and vibrationCommon
- Failing EGT sensor with an unstable outputCommon
- Corrosion or spread terminals at the connectorLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and locate the bank 1, sensor 4 EGT sensor.
- Wiggle-test the wiring and connector while watching live temperature data for dropouts.
- Inspect harness routing near exhaust heat for chafe or melt damage.
- Clean or repair the connector and secure the harness.
- Replace the sensor if the signal stays erratic, then clear and retest.
FAQ
Quick answers
Is it safe to drive with P2472?+
Short-term usually, but intermittent faults are easy to ignore and can still disrupt regeneration or exhaust protection. Track it down before it becomes a steady fault or a derate.
Can I just clear P2472?+
Clearing it may hide the problem briefly, but an intermittent wiring or sensor fault will set it again. Find the loose connection first.
Related codes
Often seen with P2472
Read & clear P2472 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX